Ben 10: Ultimate Alien, Cartoon Network

A year after Ben Tennyson defeated Vilgax, he's known the world over as a hero -- to kids, anyway. Adults are somewhat more suspicious. Armed with his mysterious new "Ultimatrix," which can transform his aliens into their "ultimate" forms, Ben and his pals Gwen and Kevin are ready for more action. Available on Cartoon Network.

Cartoon Base on X: 13 years ago today, 'BEN 10: ULTIMATE ALIEN' premiered on Cartoon Network. What's your favorite Ben 10 series!? / X

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